> If one car only needs extremely small margins to park, it's possible for conventional cars ahead or behind to lose too much of their normally-expected larger

> If one car only needs extremely small margins to park, it's possible for conventional cars ahead or behind to lose too much of their normally-expected larger buffer space, and be unable to (easily) leave. Doesn't the same apply already with large low-maneuverability vehicles versus subcompacts? If there's a Ford Excursion or Chevy Suburban overhanging a parallel parking space in to the space in front of it, there's a good chance my Fiesta still fits just fine. If I park there, that's probably going to make it harder for them to leave. I know in a lot of the world the American city style of parallel parking with defined spaces isn't a thing, you just park along the curb wherever your vehicle fits, but still this situation already exists. Smart cars, those little one seat city runabouts, motorcycles, etc. will fill the tiniest gaps given the opportunity and people still get by.